Cog-wheel



L". ATWOOD.

GOG WHEEL.

Patented June 24, 1890.

FfC,

(No Model.)

New 8 tUNITED STATES PATENT rrlcn.

LEONARD ATIVOOD, OF PHILADELPHIA, PENNSYLVANIA.

ycoe-WHEEL.

SPECIFICATION forming part of Letters Patent No. 430,818, dated June 24, 1890.

' Application tiled March 20, 1890. Serial No. 344,662. (No model.)

T @ZZ wiz/0m t may concern:

Beit known that I, LEONARD ATWOOD, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in the Construction of Cog-\Vheels, of which the following is a specification.

The object of my invention is to construct a sectional cog-wheel provided with detachable teeth, in a manner fully described hereinafter, reference bein g'had to the accompanying drawings, in which- Figure' I is a face View of my improved wheel. Fig. 2 is a section on the line l 2, Fig. I. Fig. 3 is a face view, partly in section, of the rim. Fig. I is a view of the center. Fig. 5 is an enlarged View showing the application of the teeth to the rim. Fig. (5 is a perspective view of one of the teeth, and Fig. 7 is a perspective view of the wedge for the teeth.

A is the center of the wheel, which can be mounted on a suitable shaft A. This center A has a ring a and spokes l), and in the ring are a series of orifices c.

B is the rim formed of an outer ring D and an inner ring E, connected together at intel vals by tie-pieces c. On the ringE is afiange E', having a series of orifices d, coinciding with the orifices c in the ring a of the center A. i'lange E and the ring a, thus securing the center to the rim. The outer ring D has a series of radial tapered openings g, in which are inserted the teeth I, made, preferably, of hard wood. These teeth project through the .ring into Ithe space @c between the rings D and E, and have undercut shanks fz, and fitting between the shanks of adjoining teeth are wedges II, (clearly shown in Fig. 7,) which rmly hold the teeth in their sockets g. By this arrangement of parts the cog-wheel can be readily constructed and repaired, and the rim and its cog-teeth can be readily removed from the center without removing the shaft, and any one of the teeth can be removed from its socket and replaced without interfering with the other teeth of the wheel. By

Transverse bolts G pass through this having the rings D and E united by the tiepieces e a certain amount of elasticity is ob tained, together with the bolting of the center to the ring, and the insertion of elastic packing n between the two, as shown in Fig. 2, enables the use of a cog constructed on this principle of great advantage in connection :5 with electric motors, and especially with electric-motor-driven cars, as the gears run much` more smoothly and the sound is deadened to a certain degree by the elastic packing. Vhere the side of a tooth rests against the tie-piece, as shown in Fig. 3, that side of the tooth is perfectly at, while the opposite side is undercut to receive the wedge.

I claim as my inventiond l. The combination of the center, adapted .to be secured to a shaft, a rim, transverse bolts securing the rim to the center with detachable teeth having undercut shanks, and keys adapted to secure the teeth to the ring, substantially as described.

2. The combination of the center with the rings I) and E, said ring E secured. to the center, and the ring D,having teeth and con nected to the ring E by tie-pieces, substantially as described.

3. The combination of the wheel-center, having a series of oritices, rings D and E, -tiepieces e, connecting the rings D and E together, a flange on the ring E, having orifices, and bolts passing through the orilices in the 8o flange and in the rim of the center with detachable teeth secured to the ring D, substantially as described.

4. The combination of the center, the rim composed of two rings tied together, and trans- 8 5 verse bolts securing the rim to the center with elastic packing between the rim' and center, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of 9o two subscribing witnesses.

LEONARD ATW'OOD. Vitnesses:

HENRY I-IowsoN, HARRY SMITH. 

